Mud guard for submarine drills



Oct. 22,1929. c. c. HANSEN MUD GUARD FCR SUBMARINE DRILLS Filed 0G17. 6, 1927.

INVENTOR. ap es/ fasen. BY

HS A TTRNEY.

Patented Oct. 22, 1929 UNITED STATES PATENT OFFl'C CHARLES C. HANSEN, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY,` A CORPORATION 0F NEW' JERSEY MUD GUARD FOR. SUBMARIN'E DRILLS Application filed October 6, 1927.

This invention relates to submarine drills, but more particularly to a submarine hainmer drill having a mud guard or protective shield for the hollow drill steel substantially like that shown in United States Patent No. 1,645,989, granted to Charles C. Hansen October 18, 1927.

The mud guard is slidably supported at the lower end of either a guide frame or a spud, movable vertically in a main frame,

and one ot the objects of the present invention is to enable the mud guard to be initially forced into the loose bottom material which covers the rock to be drilled.

Other objects are to enablethe forcing device to be manipulated from the surface and also secure means for forcibly holding the mud guard in position as the drilling element is raised for changing drill steels. This avoids the possibility of disturbing or raising the mud guard when the drill steel is pulled upwardly out of the hole and out or' the mnd guard. Otherwise loose or broken material in the hole being drilled may clog the drill steel and cause it to loosen or raise the mud guard in removing the steel through the mud guard.

The invention is shown in one of its preferred forms in the accompanying drawings, in which Figure l is a diagrammatic side elevation partly in vertical section and partly broken away showing part of a barge and enough of the submarine drilling apparatus to illustrate the invention,

Figure 2 is an enlarged detail side elevation of the lower portion ot the guide trame, shown in this instance as a Spud, with the mud guard slidably mounted in the shoe portion of the Spud, and

Figure 3 is a transverse sectional view of Figure 2 taken on the line 3-3 looking in the direction of the arrows.

Referring to the drawings, a barge A, only a portion of which is shown, is adapted to .have mounted thereon one or more drilling units B only one unit being shown in this instance, and each unit is provided with a submarine rock drill C of the hammer type adapted to be submerged in the water D during the drilling operation. The loose Serial No, 224,392.

material and broken rock usually upon the bottom of a river or on the bed of any bodyoi water is represented at E and the roch or hard material to be drilled is represented as at F.

Each submarine drilling unit of the hammer type is provided with a main frame H, having guides J which may be in the torni olf angle irons secured to the plates L and extending downwardly a suilicient distance to the points a for instance to guide and support a spud or guide frame K which is vertically movable on the guides J' and is ot sufficient length to extend downwardly in the water to the bottom or to a point in the loose I naterial on the bottom adjacent the rock to be drilled.

The guide frame K is itself provided with guides. O and the movable drilling element which in this instance comjrises the rock drill C and the drilling trame F is provided with guide jaws Q engaging the guides O so that thedrilling element moves vertically on the spud or guide trame K. y

A motor R oi' any suitabletype drives the drum S and winding cable T 'for raising and lowering the spud K and another motor and drum U carries the cable V adapted to be connected to the drilling 'trame P tor raising and lowering the drill.

The hammer drill C is provided with a hollow drill steel "W adapted to extend through the tubular mud guard or protective shield X supported and guided in the shoe a at the lower end of the guide frame or spud K.

The mud guard or protective shield is located below the drilling element so that the weight oit the drilling clement may rest upon the mud guard to torce it down to the rock to be drilled, and in accordance with this invention, additional means are provided operable from the surface ,tor initially torcing the mud guard into the loose bottom material and holding the guard in position. In this instance a flexible connection shown as a chain b is connected at c to the upper portion of the mud guard in any suitable manner as by means of a pin d and this chain extends downwardly through an openfio ing or slot e in the shoe a and then extends upwardly and is Connected to a exible connection or cable f which extends above the surface. In this instance the cable f is connected to a hook g carried by the block and tackle k suspended over the chain block or hoist of the self-locking type supported at the upper end of the guide frame K. A hand chain if: is provided for taking up on the block and tackle and tightening the cable f and chain Y) so that tension may be placed on the chain b in order to force the mud guard X downwardly into the loose material in the bot-toni and hold the mud guard in position during the drilling` operation and during the changing of tlie drill steels. I claim:

. A. submarine drill unit, having a main fraine provided with guides, a guide frame vertically movable on said guides, a shoe secured to the guide frame and having a slot, a drilling element, 'a tubular lnud guard adjustably supported by the shoe below the drilling elrnent, whereby the weight of the drillingl eleni'ent may rest upon the inud guardA to force it Adown to the rock to be drilled, a flexible connection secured to the upper portion of the mud guard, then passing downwardly and through the slot and extending upwardly for manipulation at the surface for forcing the mud guard into the loose bottom material, and a chain hoist secured to theV upper end of the guide frame and connected to thefflexible connection for drawing the mud guard against the work and for preventing unauthorized retraction of the mud guard.

In testimony whereof I have signed this specification.

CHARLES C. HANSEN. 

